Cancer 4 Cure revisits familiar territory: knotty raps on urban paranoia and police state tactics, and "constellation funk" that increasingly resembles industrial prog-rock. It takes multiple listens to process, and the payoff isn't as tremendous as past classics like Fantastic Damage. Still, there's something to be said for virtually inventing your own hip-hop sub-genre -- his closest precedent may be Nine Inch Nails. The clear storylines of "Tougher Colder Killer" and "For My Upstairs Neighbor" have a velocity that the rest of El's murky yet memorably abrasive album sometimes lacks.